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Embarrasingly Dumb question about non-precision approach

PostPosted: Sat Jul 10, 2010 3:00 pm
by snippyfsxer
OK, so let us say that I'm flying an approach where I start the stopwatch at the FAF and time myself to the MAP.

Re: Embarrasingly Dumb question about non-precision approach

PostPosted: Sat Jul 10, 2010 3:09 pm
by snippyfsxer
My question already assumes ground speed is a known and has nothing to do with that or spatial awareness.

Re: Embarrasingly Dumb question about non-precision approach

PostPosted: Sat Jul 10, 2010 3:55 pm
by WPadgett
Yes.

Re: Embarrasingly Dumb question about non-precision approach

PostPosted: Sat Jul 10, 2010 5:25 pm
by -Crossfire-
Yes.


+1

Just make up your own time as close to the middle as you can between 130 and 150 kts.  Make sure you do it in your approach breifing so you're ahead of the game.

Re: Embarrasingly Dumb question about non-precision approach

PostPosted: Sun Jul 11, 2010 10:49 am
by aeroart
Fly your airplane at its proper final approach airspeed. Add or subtract the headwind or tailwind component. See where that ground speed falls (proportionally) between adjacent values given in the "FAF to MAP" table. Estimate the time based on the values in the "Min:Sec" row of the table.

Art

Re: Embarrasingly Dumb question about non-precision approach

PostPosted: Mon Jul 12, 2010 6:46 am
by Brett_Henderson
A big limitation to keep in mind, is that the visibility/ceiling limit for the highest speed on the chart. If you improvise a higher approach speed, you're effectively increasing those limits too. In other words.. a non-precision approach for a heavy/fast airplane, will be near VFR conditions. In other OTHER words.. if the conditions are at minimum for a slower airplane; the runway isn't even available to you.